myrtle flag myrt·lef·lag uncommon noun 1. perennial marsh plant having swordlike leaves and aromatic roots Synonymssweet flagcalamussweet calamusmyrtle flagflagrootAcorus calamus Related words Broader terms marsh plant Parts Acorus Part of calamuscalamus oil WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
